try rebooting and looking for disk led activity for several seconds after the screen freezes. If you have this symptom it is likely that you invoked kms graphics and have a graphics configuration problem. That type problem can be examined by booting cd and mounting the gentoo partitions and looking for dmesg at /mnt/gentoo/var/log/dmesg. If there is a dmesg graphics support is likely to be the problem. Lack of a dmesg suggests another problem in kernel configuration. adding nomodeset to the kernel line in /mnt/gentoo/boot/grub/grub.conf may allow a normal display on a reboot without repairing graphics support kernel configuration._________________Defund the FCC.